/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.pig.backend.hadoop.executionengine.tez;
import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.security.Credentials;
import org.apache.hadoop.yarn.api.records.LocalResource;
import org.apache.hadoop.yarn.exceptions.YarnException;
import org.apache.pig.PigException;
import org.apache.pig.backend.hadoop.executionengine.JobCreationException;
import org.apache.pig.backend.hadoop.executionengine.tez.plan.TezOperPlan;
import org.apache.pig.backend.hadoop.executionengine.tez.plan.TezPlanContainer;
import org.apache.pig.backend.hadoop.executionengine.tez.plan.TezPlanContainerNode;
import org.apache.pig.impl.PigContext;
import org.apache.tez.dag.api.DAG;
import org.apache.tez.dag.api.TezConfiguration;
/**
* This is compiler class that takes a TezOperPlan and converts it into a
* JobControl object with the relevant dependency info maintained. The
* JobControl object is made up of TezJobs each of which has a JobConf.
*/
public class TezJobCompiler {
private static final Log log = LogFactory.getLog(TezJobCompiler.class);
private PigContext pigContext;
private TezConfiguration tezConf;
public TezJobCompiler(PigContext pigContext, Configuration conf) throws IOException {
this.pigContext = pigContext;
this.tezConf = new TezConfiguration(conf);
}
public DAG buildDAG(TezPlanContainerNode tezPlanNode, Map<String, LocalResource> localResources)
throws IOException, YarnException {
DAG tezDag = DAG.create(tezPlanNode.getOperatorKey().toString());
tezDag.setCredentials(new Credentials());
TezDagBuilder dagBuilder = new TezDagBuilder(pigContext, tezPlanNode.getTezOperPlan(), tezDag, localResources);
dagBuilder.visit();
return tezDag;
}
public TezJob compile(TezPlanContainerNode tezPlanNode, TezPlanContainer planContainer)
throws JobCreationException {
TezJob job = null;
try {
// A single Tez job always pack only 1 Tez plan. We will track
// Tez job asynchronously to exploit parallel execution opportunities.
job = getJob(tezPlanNode, planContainer);
} catch (JobCreationException jce) {
throw jce;
} catch(Exception e) {
int errCode = 2017;
String msg = "Internal error creating job configuration.";
throw new JobCreationException(msg, errCode, PigException.BUG, e);
}
return job;
}
private TezJob getJob(TezPlanContainerNode tezPlanNode, TezPlanContainer planContainer)
throws JobCreationException {
try {
Map<String, LocalResource> localResources = new HashMap<String, LocalResource>();
localResources.putAll(planContainer.getLocalResources());
TezOperPlan tezPlan = tezPlanNode.getTezOperPlan();
localResources.putAll(tezPlan.getExtraResources());
String shipFiles = pigContext.getProperties().getProperty("pig.streaming.ship.files");
if (shipFiles != null) {
for (String file : shipFiles.split(",")) {
TezResourceManager.getInstance().addTezResource(new File(file).toURI());
}
}
String cacheFiles = pigContext.getProperties().getProperty("pig.streaming.cache.files");
if (cacheFiles != null) {
for (String file : cacheFiles.split(",")) {
// Do new URI() before passing to Path constructor else it encodes # when there is symlink
TezResourceManager.getInstance().addTezResource(new Path(new URI(file.trim())).toUri());
}
}
for (Map.Entry<String, LocalResource> entry : localResources.entrySet()) {
log.info("Local resource: " + entry.getKey());
}
DAG tezDag = buildDAG(tezPlanNode, localResources);
return new TezJob(tezConf, tezDag, localResources, tezPlan.getEstimatedTotalParallelism());
} catch (Exception e) {
int errCode = 2017;
String msg = "Internal error creating job configuration.";
throw new JobCreationException(msg, errCode, PigException.BUG, e);
}
}
}